CN206638830U - Tritium accumulates sampling system in a kind of air - Google Patents
Tritium accumulates sampling system in a kind of air Download PDFInfo
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- CN206638830U CN206638830U CN201720395055.6U CN201720395055U CN206638830U CN 206638830 U CN206638830 U CN 206638830U CN 201720395055 U CN201720395055 U CN 201720395055U CN 206638830 U CN206638830 U CN 206638830U
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- bubbler
- air
- tritium
- hto
- control valve
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Abstract
The utility model discloses tritium in a kind of air to accumulate sampling system, the tritium accumulation sampling system includes two-way sampling subsystem, sampling subsystem I directly collects the HTO in air by bubbler I and bubbler II all the way, another subsystems II carry out catalysis oxidation by catalytic bed I and catalytic bed II to the HT in air respectively, HTO before bubbler III and bubbler IV are collected and aoxidized in air and after oxidation, and then collect HT and HTO whole in air successively again is translated into after HTO.Tritium accumulation sampling system can be to sample week, the moon for a long time as sample time in air of the present utility model, it is on duty always without operating personnel, alleviate the labor intensity of tritium monitoring sampling personnel and improve operating efficiency, meet the long-time accumulation sampling for relating to low concentration HTO and HT in the air of tritium place.
Description
Technical field
The utility model belongs to radiation protection and environmental protection technical field, and in particular to tritium accumulation sampling in a kind of air
System.
Background technology
Relating to tritium place in nuclear power station, tritium target production, accelerator for neutron production production etc. all can be to ring under normal and accident conditions
A certain amount of tritium is discharged in border（Including HTO and HT）, because tritium be the radio isotope of hydrogen, there is β radiation, human body can be made
Into a certain amount of interior irradiation harm, therefore, it is necessary to the tritium concentration in yard in one's power effluent is measured.At present, it is domestic
Tritium concentration measurement is carried out frequently with ionization chamber outside, but surveys the sensitivity of tritium ionisation chamber typically 105Bq/m3Left and right, it is far above
Tritium concentration in environment（About tens Bq/m3）.Because surrounding air has certain humidity, therefore the HT in air can be to
HTO changes, in normal temperature（20℃）, normal pressure（1atm）, normal humidity（50%-60%）Under, have half within about 60 days or so
HT is converted into HTO, and HTO inhalation hazard is the 1.0 × 10 of HT4Times, therefore, it is necessary to be entered using certain means and method
HTO and HT measurement in row environment.
At present, mainly there are " silica gel adsorption " and " Bubbling method " for the sampling and measuring method of tritium in surrounding air." silica gel
Absorption method " is using the HTO in the drier such as silica gel absorption air, then obtains HTO using high temperature distillation mode；" Bubbling method "
It is by there is the wash bottle of distilled water that bubbling occurs by radgas, the HTO in air sample exchanges with water progress isotope,
After sufficiently long sample time, the tritium level in water is collected with scintillation counter measure bubbler, so as to try to achieve in air
The mean concentration of tritium.For comparing, the sampling efficiency of " silica gel adsorption " is not only relevant with the adsorption capacity of silica gel, Er Qieyu
The distillation efficiency of distilling apparatus is relevant, and therefore, the sampling efficiency of " silica gel adsorption " is relatively low.And " Bubbling method " device therefor compares
Simply, sampling efficiency is higher.Currently, need badly a kind of small-sized tritium accumulation sampling system being suitable to relate in tritium working environment of development with
Protect the personal safety of operating personnel.
The content of the invention
Technical problem to be solved in the utility model is to provide tritium in a kind of air and accumulates sampling system.
Tritium accumulates sampling system in air of the present utility model, is characterized in：Described tritium accumulation sampling system include with
The connected filter of gas sample pipeline, in addition to threeway I and threeway II, catalytic bed I and catalytic bed II, bubbler I, bubbler
IIth, bubbler III, bubbler IV and pump.
Its annexation is that filter is connected by the one end of threeway I respectively with control valve I and control valve II, control valve I
The other end pass sequentially through bubbler I, bubbler II is connected with one end of threeway II；The other end of control valve II, which passes sequentially through, urges
Change bed I, catalytic bed II, bubbler III, bubbler IV to be connected with the other end of threeway II；3rd end of threeway II and control valve III
One end connection, the other end of control valve III is connected after being connected with pump by tracheae with exhaust emission pipeline；It is each in sampling system
Part is connected by pipeline.
Described tritium accumulation sampling system includes two-way sampling subsystem, samples subsystem I all the way and passes through bubbler I and drum
Bubbler II directly collects the HTO in air, and another subsystems II are respectively by catalytic bed I and catalytic bed II to the HT in air
Catalysis oxidation is carried out, is translated into after HTO again successively by aoxidizing preceding and oxygen in bubbler III and the collection air of bubbler IV
HTO after change, and then collect HT and HTO whole in air.
Described bubbler can increase according to need of work, the abundant bubble absorption by the way of multistage bubbler is in series
HTO in air.
In described sampling subsystem I, suspended body flowmeter I, quality stream are sequentially connected between control valve I and bubbler I
The measurement sampling subsystem I of gauge I enters the HTO of bubbler I flow；In described sampling subsystem II, control valve II with
Be sequentially connected between catalytic bed I suspended body flowmeter II, mass flowmenter II measurement sampling subsystem II enter catalytic bed I HT and
HTO flow.
The connecting pipe of each part is 316L stainless steel tubes in described sampling system.Will according to the connection size of each part
Ask, the internal diameter of the pipeline of 316L stainless steel tubes is selected, typically using 1/4inch, 1/8inch or 1/2inch.
Described bubbler I, bubbler II, bubbler III, the top of bubbler IV use seal cap sealing, each bubbling
The sample feeding pipe of device stretches to the liquid level bottom of bubbler through closure, and out sample tube passes the liquid level that closure is suspended in bubbler
Top；The material of bubbler is quartz glass, loads in bubbler and removes HTO.
Described control valve I and control valve II are one kind in hand-operated valve or automatic valve, and described control valve III is unidirectional
Control valve.
The range of flow of described pump is 0.5L/min ~ 5L/min.
The sampling method of tritium accumulation sampling system uses Bubbling method in air of the present utility model, and the HTO in air is led to
Enter bubbler, make HTO and water that isotope occur and exchange, after sufficiently long action time, in the HTO and bubbler in air
Water complete exchange, so as to realize that the accumulation of air sample samples.Sampling system is using two-way sampling design：Under test gas passes through three
It is divided into two-way after logical, gas is directly entered the bubbler of series connection all the way, collects the HTO in air, another way gas is by series connection
Catalytic bed catalytic action, after HT complete oxidations are converted into HTO in gas, then by series connection bubbler collect sky in the lump
The original HTO and HTO after catalysis in gas.Load in bubbler and remove HTO, by HTO and go the long-time isotope of HTO to hand over
After changing, HTO complete exchanges reach the purpose for collecting low concentration tritium in air, while pass through flow control valve pair in HTO is removed
Sample flow is adjusted, collect it is different in flow rate under air in tritium sample, by the control of check valve, avoid air reclaimed water
Steam, which flows backwards, enters bubbler.
Tritium accumulates sampling system in air of the present utility model, and impurity mistake is carried out to the gas for entering system using filter
Filter, greatly reduces influence of the introducing of impurity to systematic sampling accuracy and long-time stability.The utility model, which is met, to be related to
Tritium place（Nuclear power station, tritium target production, accelerator for neutron production production etc.）Air in low concentration HTO and HT long-time accumulation take
Sample.
Tritium accumulation sampling system can sample for a long time using all, moon as sample time in air of the present utility model, without
Operating personnel are on duty always, alleviate the labor intensity of tritium monitoring sampling personnel and improve operating efficiency.
Brief description of the drawings
Fig. 1 is the structural representation that tritium accumulates sampling system in air of the present utility model；
In figure, the quality stream of 1. gas sample pipeline, 2. filter, 3. threeway, I 4. control valve, I 5. suspended body flowmeter I 6.
The suspended body flowmeter II of IV 11. control valve of gauge I 7. bubbler, I 8. bubbler, II 9. bubbler, III 10. bubbler II 12.
13. the tail gas of III 18. pump of mass flowmenter II 14. catalytic bed, I 15. catalytic bed, II 16. threeway, II 17. control valve 19. is arranged
Put pipeline.
Embodiment
Describe the utility model in detail with reference to the accompanying drawings and examples.
As shown in figure 1, tritium accumulation sampling system includes the mistake being connected with gas sample pipeline 1 in air of the present utility model
Filter 2, in addition to threeway I 3 and threeway II 16, catalytic bed I 14 and catalytic bed II 15, bubbler I 7, bubbler II 8, bubbler
III 9, bubbler IV 10 and pump 18.
Its annexation is that filter 2 is connected by the one end of threeway I 3 respectively with control valve I 4 and control valve II 11, control
The other end of valve I 4 processed passes sequentially through bubbler I 7, bubbler II 8 is connected with one end of threeway II 16；Control valve II 11 it is another
End passes sequentially through catalytic bed I 14, catalytic bed II 15, bubbler III 9, bubbler IV 10 and is connected with the other end of threeway II 16；Three
Logical II 16 the 3rd end is connected with one end of control valve III 17, the other end of control valve III 17 be connected with pump 18 after by tracheae and
Exhaust emission pipeline 19 connects；Each part is connected by pipeline in sampling system.
Described tritium accumulation sampling system includes two-way sampling subsystem, samples subsystem I all the way and passes through the He of bubbler I 7
Bubbler II 8 directly collects the HTO in air, and another subsystems II pass through II 15 pairs of skies of catalytic bed I 14 and catalytic bed respectively
HT in gas carries out catalysis oxidation, is translated into after HTO and is collected successively by bubbler III 9 and bubbler IV 10 in air again
HTO before oxidation and after oxidation, and then collect HT and HTO whole in air.
In described sampling subsystem I, suspended body flowmeter I 5, quality are sequentially connected between control valve I 4 and bubbler I 7
The measurement sampling subsystem I of flow meter I 6 enters the HTO of bubbler I 7 flow；In described sampling subsystem II, in control valve
Suspended body flowmeter II 12 is sequentially connected between II 11 and catalytic bed I 14, the measurement sampling subsystem II of mass flowmenter II 13 enters
The HT and HTO of catalytic bed I 14 flow.
The connecting pipe of each part is 316L stainless steel tubes in described sampling system.Will according to the connection size of each part
Ask, the internal diameter of the pipeline of 316L stainless steel tubes is selected, typically using 1/4inch, 1/8inch or 1/2inch.
Described bubbler I 7, bubbler II 8, bubbler III 9, the top of bubbler IV 10 use seal cap sealing, often
The sample feeding pipe of individual bubbler stretches to the liquid level bottom of bubbler through closure, and out sample tube passes closure and is suspended in bubbler
Ullage；The material of bubbler is quartz glass, loads in bubbler and removes HTO.
Described control valve I 4 and control valve II 11 are one kind in hand-operated valve or automatic valve, and described control valve III 17 is
One-way control valve.
The range of flow of described pump 18 is 0.5L/min ~ 5L/min.
Embodiment 1
The internal diameter of the pipeline for the 316L stainless steel tubes that system uses uses 1/4inch, the control valve I 4 of use in the present embodiment
It is hand-operated valve with control valve II 11.During sampling, room temperature is 28 DEG C, humidity 62%, sampling velocity 2.5L/min, during sampling
Between be 12h, sampling obtains full tritium concentration as 1.45 × 102Bq/m3, HTO concentration is 1.39 × 102Bq/m3。
Embodiment 2
The internal diameter of the pipeline for the 316L stainless steel tubes that system uses uses 1/8inch, the control valve I 4 of use in the present embodiment
It is automatic valve with control valve II 11.During sampling, room temperature is 25 DEG C, humidity 50%, sampling velocity 0.8L/min, during sampling
Between be 32h, sampling obtains full tritium concentration as 1.61 × 103 Bq/m3, HTO concentration is 4.27 × 101 Bq/m3。
Embodiment 3
The internal diameter of the pipeline for the 316L stainless steel tubes that system uses uses 1/2inch, the control valve I 4 of use in the present embodiment
It is hand-operated valve with control valve II 11.During sampling, room temperature is 26 DEG C, and humidity 68%, sampling velocity is 5 L/min, sample time
For 8h, sampling obtains full tritium concentration as 8.9 × 102Bq/m3, HTO concentration is 1.73 × 101Bq/m3。
Embodiment 4
The internal diameter of the pipeline for the 316L stainless steel tubes that system uses uses 1/8inch, the control valve I 4 of use in the present embodiment
It is automatic valve with control valve II 11.During sampling, room temperature is 23 DEG C, and humidity 54%, sampling velocity is 0.5 L/min, during sampling
Between be 70h, sampling obtains full tritium concentration as 1.37 × 103Bq/m3, HTO concentration is 1.05 × 102Bq/m3。
The utility model is not limited to above-mentioned embodiment, and person of ordinary skill in the field visualizes from above-mentioned
Hair, without performing creative labour, made a variety of conversion, all falls within the scope of protection of the utility model.
Claims (5)
1. tritium accumulates sampling system in a kind of air, it is characterised in that：Described tritium accumulation sampling system includes and gas sample
Pipeline（1）Connected filter（2）, in addition to threeway I（3）With threeway II（16）, catalytic bed I（14）With catalytic bed II（15）、
Bubbler I（7）, bubbler II（8）, bubbler III（9）, bubbler IV（10）And pump（18）；
Its annexation is filter（2）Pass through threeway I（3）Respectively with control valve I（4）With control valve II（11）One end connect
Connect, control valve I（4）The other end pass sequentially through bubbler I（7）, bubbler II（8）With threeway II（16）One end connection；Control
Valve II processed（11）The other end pass sequentially through catalytic bed I（14）, catalytic bed II（15）, bubbler III（9）, bubbler IV（10）With
Threeway II（16）The other end connection；Threeway II（16）The 3rd end and control valve III（17）One end connection, control valve III
（17）The other end and pump（18）Pass through tracheae and exhaust emission pipeline after connection（19）Connection；Each part passes through in sampling system
Pipeline connects；
Described tritium accumulation sampling system includes two-way sampling subsystem, samples subsystem I all the way and passes through bubbler I（7）And drum
Bubbler II（8）The HTO in air is directly collected, another subsystems II pass through catalytic bed I respectively（14）With catalytic bed II（15）
Catalysis oxidation is carried out to the HT in air, is translated into after HTO and passes through bubbler III successively again（9）With bubbler IV（10）Receive
Collect the HTO before being aoxidized in air and after oxidation, and then collect HT and HTO whole in air.
2. tritium accumulates sampling system in air according to claim 1, it is characterised in that：In described sampling subsystem I,
In control valve I（4）With bubbler I（7）Between be sequentially connected suspended body flowmeter I（5）, mass flowmenter I（6）Measurement sampling subsystem
System I enters bubbler I（7）HTO flow；In described sampling subsystem II, in control valve II（11）With catalytic bed I（14）
Between be sequentially connected suspended body flowmeter II（12）, mass flowmenter II（13）Measurement sampling subsystem II enters catalytic bed I（14）
HT and HTO flow.
3. tritium accumulates sampling system in air according to claim 1, it is characterised in that：Described bubbler I（7）, drum
Bubbler II（8）, bubbler III（9）, bubbler IV（10）Top use seal cap sealing, the sample feeding pipe of each bubbler passes through
Closure stretches to the liquid level bottom of bubbler, and out sample tube passes the ullage that closure is suspended in bubbler.
4. tritium accumulates sampling system in air according to claim 1, it is characterised in that：Described control valve I（4）And control
Valve II processed（11）For one kind in hand-operated valve or automatic valve, described control valve III（17）For one-way control valve.
5. tritium accumulates sampling system in air according to claim 1, it is characterised in that：Described pump（18）Flow model
Enclose for 0.5L/min ~ 5L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395055.6U CN206638830U (en) | 2017-04-17 | 2017-04-17 | Tritium accumulates sampling system in a kind of air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395055.6U CN206638830U (en) | 2017-04-17 | 2017-04-17 | Tritium accumulates sampling system in a kind of air |
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| Publication Number | Publication Date |
|---|---|
| CN206638830U true CN206638830U (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720395055.6U Expired - Fee Related CN206638830U (en) | 2017-04-17 | 2017-04-17 | Tritium accumulates sampling system in a kind of air |
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| CN (1) | CN206638830U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886042A (en) * | 2017-04-17 | 2017-06-23 | 中国工程物理研究院核物理与化学研究所 | Tritium accumulation sampling system in a kind of air |
| CN108646282A (en) * | 2018-05-31 | 2018-10-12 | 拓世氢源（深圳）科技有限公司 | Gaseous state tritiated water on-line water flushing system based on plastic scintillant |
-
2017
- 2017-04-17 CN CN201720395055.6U patent/CN206638830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886042A (en) * | 2017-04-17 | 2017-06-23 | 中国工程物理研究院核物理与化学研究所 | Tritium accumulation sampling system in a kind of air |
| CN108646282A (en) * | 2018-05-31 | 2018-10-12 | 拓世氢源（深圳）科技有限公司 | Gaseous state tritiated water on-line water flushing system based on plastic scintillant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20190417 |